static std::string ycbcr_enc2s(int val)
{
switch (val) {
case V4L2_YCBCR_ENC_DEFAULT:
return "Default";
case V4L2_YCBCR_ENC_601:
return "ITU-R 601";
case V4L2_YCBCR_ENC_709:
return "Rec. 709";
case V4L2_YCBCR_ENC_XV601:
return "xvYCC 601";
case V4L2_YCBCR_ENC_XV709:
return "xvYCC 709";
case V4L2_YCBCR_ENC_SYCC:
return "sYCC";
case V4L2_YCBCR_ENC_BT2020:
return "BT.2020";
case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
return "BT.2020 Constant Luminance";
case V4L2_YCBCR_ENC_SMPTE240M:
return "SMPTE 240M";
default:
return "Unknown (" + num2s(val) + ")";
}
}
std::string colorspace2s(int val)
{
switch (val) {
case V4L2_COLORSPACE_DEFAULT:
return "Default";
case V4L2_COLORSPACE_SMPTE170M:
return "SMPTE 170M";
case V4L2_COLORSPACE_SMPTE240M:
return "SMPTE 240M";
case V4L2_COLORSPACE_REC709:
return "Rec. 709";
case V4L2_COLORSPACE_BT878:
return "Broken Bt878";
case V4L2_COLORSPACE_470_SYSTEM_M:
return "470 System M";
case V4L2_COLORSPACE_470_SYSTEM_BG:
return "470 System BG";
case V4L2_COLORSPACE_JPEG:
return "JPEG";
case V4L2_COLORSPACE_SRGB:
return "sRGB";
case V4L2_COLORSPACE_ADOBERGB:
return "AdobeRGB";
case V4L2_COLORSPACE_DCI_P3:
return "DCI-P3";
case V4L2_COLORSPACE_BT2020:
return "BT.2020";
case V4L2_COLORSPACE_RAW:
return "Raw";
default:
return "Unknown (" + num2s(val) + ")";
}
}
std::string field2s(int val)
{
switch (val) {
case V4L2_FIELD_ANY:
return "Any";
case V4L2_FIELD_NONE:
return "None";
case V4L2_FIELD_TOP:
return "Top";
case V4L2_FIELD_BOTTOM:
return "Bottom";
case V4L2_FIELD_INTERLACED:
return "Interlaced";
case V4L2_FIELD_SEQ_TB:
return "Sequential Top-Bottom";
case V4L2_FIELD_SEQ_BT:
return "Sequential Bottom-Top";
case V4L2_FIELD_ALTERNATE:
return "Alternating";
case V4L2_FIELD_INTERLACED_TB:
return "Interlaced Top-Bottom";
case V4L2_FIELD_INTERLACED_BT:
return "Interlaced Bottom-Top";
default:
return "Unknown (" + num2s(val) + ")";
}
}
std::string buftype2s(int type)
{
switch (type) {
case 0:
return "Invalid";
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return "Video Capture";
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
return "Video Capture Multiplanar";
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
return "Video Output";
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return "Video Output Multiplanar";
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
return "Video Overlay";
case V4L2_BUF_TYPE_VBI_CAPTURE:
return "VBI Capture";
case V4L2_BUF_TYPE_VBI_OUTPUT:
return "VBI Output";
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
return "Sliced VBI Capture";
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return "Sliced VBI Output";
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
return "Video Output Overlay";
case V4L2_BUF_TYPE_SDR_CAPTURE:
return "SDR Capture";
case V4L2_BUF_TYPE_SDR_OUTPUT:
return "SDR Output";
default:
return "Unknown (" + num2s(type) + ")";
}
}
static std::string quantization2s(int val)
{
switch (val) {
case V4L2_QUANTIZATION_DEFAULT:
return "Default";
case V4L2_QUANTIZATION_FULL_RANGE:
return "Full Range";
case V4L2_QUANTIZATION_LIM_RANGE:
return "Limited Range";
default:
return "Unknown (" + num2s(val) + ")";
}
}
std::string flags2s(unsigned val, const flag_def *def)
{
std::string s;
while (def->flag) {
if (val & def->flag) {
if (s.length()) s += ", ";
s += def->str;
val &= ~def->flag;
}
def++;
}
if (val) {
if (s.length()) s += ", ";
s += num2s(val);
}
return s;
}
static std::string xfer_func2s(int val)
{
switch (val) {
case V4L2_XFER_FUNC_DEFAULT:
return "Default";
case V4L2_XFER_FUNC_709:
return "Rec. 709";
case V4L2_XFER_FUNC_SRGB:
return "sRGB";
case V4L2_XFER_FUNC_ADOBERGB:
return "AdobeRGB";
case V4L2_XFER_FUNC_DCI_P3:
return "DCI-P3";
case V4L2_XFER_FUNC_SMPTE2084:
return "SMPTE 2084";
case V4L2_XFER_FUNC_SMPTE240M:
return "SMPTE 240M";
case V4L2_XFER_FUNC_NONE:
return "None";
default:
return "Unknown (" + num2s(val) + ")";
}
}
std::string colorspace2s(int val)
{
switch (val) {
case V4L2_COLORSPACE_SMPTE170M:
return "Broadcast NTSC/PAL (SMPTE170M/ITU601)";
case V4L2_COLORSPACE_SMPTE240M:
return "1125-Line (US) HDTV (SMPTE240M)";
case V4L2_COLORSPACE_REC709:
return "HDTV and modern devices (ITU709)";
case V4L2_COLORSPACE_BT878:
return "Broken Bt878";
case V4L2_COLORSPACE_470_SYSTEM_M:
return "NTSC/M (ITU470/ITU601)";
case V4L2_COLORSPACE_470_SYSTEM_BG:
return "PAL/SECAM BG (ITU470/ITU601)";
case V4L2_COLORSPACE_JPEG:
return "JPEG (JFIF/ITU601)";
case V4L2_COLORSPACE_SRGB:
return "SRGB";
default:
return "Unknown (" + num2s(val) + ")";
}
}